Climate and monthly weather forecastGlenarm, IL
Climate and monthly weather forecast
Weather in January
January, the same as December, is an icy winter month in Glenarm, Illinois, with temperature in the range of an average low of 21.4°F (-5.9°C) and an average high of 33.6°F (0.9°C). January is Glenarm's coldest month, registering average high temperatures of 33.6°F (0.9°C) and lows of 21.4°F (-5.9°C). Weather in January »Weather in February
February, the last month of the winter in Glenarm, is another cold month, with an average temperature varying between 38.3°F (3.5°C) and 25.2°F (-3.8°C). With February's arrival, Glenarm's weather records an average high-temperature of a still cold 38.3°F (3.5°C), marking little difference from January's 33.6°F (0.9°C). Weather in February »Weather in March
The first month of the spring, March, is a cool month in Glenarm, Illinois, with an average temperature fluctuating between 36°F (2.2°C) and 51.4°F (10.8°C). The arrival of March brings a temperature shift, with the average high-temperature escalating from an icy 38.3°F (3.5°C) in February to a cool 51.4°F (10.8°C). Weather in March »Weather in April
April in Glenarm, Illinois, is an enjoyable spring month, with an average temperature fluctuating between 46.2°F (7.9°C) and 63.3°F (17.4°C). Glenarm in April shows a temperature shift, moving from an average high of a fresh 51.4°F (10.8°C) in March to a refreshing 63.3°F (17.4°C). Weather in April »Weather in May
May, the last month of the spring in Glenarm, is an agreeable month, with temperature in the range of an average high of 72.9°F (22.7°C) and an average low of 56.1°F (13.4°C). As May arrives, a rise in the average high-temperature is observed, moving from a refreshing 63.3°F (17.4°C) in April to a pleasant 72.9°F (22.7°C). Weather in May »Weather in June
June, the first month of the summer in Glenarm, is a warm month, with temperature in the range of an average low of 64.8°F (18.2°C) and an average high of 81.1°F (27.3°C). June's onset is marked by a subtle temperature increase, moving from an agreeable 72.9°F (22.7°C) in May to a moderately hot 81.1°F (27.3°C). Weather in June »Weather in July
July, like June, in Glenarm, Illinois, is another warm summer month, with an average temperature fluctuating between 66.6°F (19.2°C) and 82.8°F (28.2°C). July, characterized by an average high temperature of 82.8°F (28.2°C) and a low temperature of 66.6°F (19.2°C), is generally the warmest month. The heat index value during July is evaluated at a tropical 91.4°F (33°C). Weather in July »Weather in August
August, the last month of the summer in Glenarm, is also a moderately hot month, with an average temperature varying between 64.8°F (18.2°C) and 81.9°F (27.7°C). The arrival of August sees an average high-temperature of a still warm 81.9°F (27.7°C), hardly diverging from July's 82.8°F (28.2°C). Weather in August »Weather in September
September, the first month of the autumn in Glenarm, is also a moderately hot month, with an average temperature fluctuating between 77.5°F (25.3°C) and 58.8°F (14.9°C). With September's arrival, Glenarm notes an average high-temperature of a still moderately hot 77.5°F (25.3°C), closely following the trend of the preceding month. Weather in September »Weather in October
October, the same as September, is another enjoyable autumn month in Glenarm, Illinois, with an average temperature varying between 48.2°F (9°C) and 64.2°F (17.9°C). Glenarm's October weather comes with a decrease in average high-temperatures, moving from a warm 77.5°F (25.3°C) in September to a refreshing 64.2°F (17.9°C). Weather in October »Weather in November
The last month of the autumn, November, is also a fresh month in Glenarm, Illinois, with an average temperature varying between 50.2°F (10.1°C) and 36.3°F (2.4°C). A decrease in the average high-temperature is observed during November, shifting from an enjoyable 64.2°F (17.9°C) in October to a cool 50.2°F (10.1°C). Weather in November »Weather in December
The first month of the winter, December, is still a cold month in Glenarm, Illinois, with an average temperature fluctuating between 28.4°F (-2°C) and 38.8°F (3.8°C). The start of December signals a decrease in the average high-temperature, transitioning from a fresh 50.2°F (10.1°C) in November to a cold 38.8°F (3.8°C). Weather in December »Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
January is the month when Glenarm sees the average lowest temperatures, with a high of 33.6°F (0.9°C) and a low of 21.4°F (-5.9°C).
Throughout the year, in Glenarm, Illinois, there are 104.2 rainfall days, and 9.29" (236mm) of precipitation is accumulated.
January through April, November and December are months with snowfall in Glenarm.
In Glenarm, during the entire year, snow falls for 18.6 days and aggregates up to 2.68" (68mm) of snow.
The month with the least sunshine in Glenarm, Illinois, is January, with an average of 4.2h of sunshine.
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
February is the month with the most snowfall in Glenarm, Illinois. Snow falls for 4.8 days and accumulates 0.91" (23mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Glenarm, Illinois, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
In Glenarm, Illinois, snow does not fall in May through October.
The month with the most rainfall in Glenarm is June, when the rain falls for 11.6 days and typically aggregates up to 1.22" (31mm) of precipitation.
With an average of 14h and 54min of daylight, June has the longest days of the year.
June has the most sunshine of the year in Glenarm, Illinois, with an average of 10.4h of sunshine.
The months with the highest UV index in Glenarm are June through August, with an average maximum UV index of 6.
July tends to be the warmest month in Glenarm, Illinois, with temperatures averaging a daily high of 82.8°F (28.2°C) and a low of 66.6°F (19.2°C).
The most humid month is July, with an average relative humidity of 83%.
October is the least humid month, with an average relative humidity of 70%.
The month with the least rainfall in Glenarm, Illinois, is December, when the rain falls for 5.5 days and typically collects 0.43" (11mm) of precipitation.
With an average of 9h and 24min of daylight, December has the shortest days of the year in Glenarm, Illinois.
Average temperature
Glenarm, IL
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (33.6°F).
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (21.4°F).
Average pressure
Glenarm, IL
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Glenarm, IL
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.3mph - Average wind speed in March:
10mph - Average wind speed in April:
10.2mph - Average wind speed in May:
8.5mph - Average wind speed in June:
7.3mph
- Average wind speed in July:
6.1mph - Average wind speed in August:
6.2mph - Average wind speed in September:
7mph - Average wind speed in October:
8.9mph - Average wind speed in November:
9.8mph - Average wind speed in December:
9.8mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is July (6.1mph).
Average humidity
Glenarm, IL
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (70%).
Average rainfall
Glenarm, IL
- Average rainfall in January:
0.63" - Average rainfall in February:
0.55" - Average rainfall in March:
0.71" - Average rainfall in April:
1.06" - Average rainfall in May:
1.06" - Average rainfall in June:
1.22"
- Average rainfall in July:
0.91" - Average rainfall in August:
0.83" - Average rainfall in September:
0.63" - Average rainfall in October:
0.79" - Average rainfall in November:
0.47" - Average rainfall in December:
0.43"
The wettest month (with the highest rainfall) is June (1.22").
The driest month (with the least rainfall) is December (0.43").
Average rainfall days
Glenarm, IL
- Average rainfall days in January:
4.4 days - Average rainfall days in February:
5.3 days - Average rainfall days in March:
8.9 days - Average rainfall days in April:
11.3 days - Average rainfall days in May:
12.5 days - Average rainfall days in June:
11.6 days
- Average rainfall days in July:
10.8 days - Average rainfall days in August:
10.5 days - Average rainfall days in September:
9.1 days - Average rainfall days in October:
7.7 days - Average rainfall days in November:
6.6 days - Average rainfall days in December:
5.5 days
The month with the highest number of rainy days is May (12.5 days).
The month with the least rainy days is January (4.4 days).
Average snowfall
Glenarm, IL
The month with the highest snowfall is February (0.91").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Glenarm, IL
- Average snowfall days in January:
5.7 days - Average snowfall days in February:
4.8 days - Average snowfall days in March:
2.3 days - Average snowfall days in April:
0.3 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.1 days - Average snowfall days in November:
1.5 days - Average snowfall days in December:
3.9 days
The month with the highest number of snowfall days is January (5.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Glenarm, IL
- Average daylight in January:
9h and 42min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 24min - Average daylight in June:
14h and 54min
- Average daylight in July:
14h and 36min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 6min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January:
4h and 12min - Average sunshine in February:
4h and 30min - Average sunshine in March:
6h and 36min - Average sunshine in April:
8h and 18min - Average sunshine in May:
9h and 18min - Average sunshine in June:
10h and 24min
- Average sunshine in July:
10h and 12min - Average sunshine in August:
9h and 54min - Average sunshine in September:
9h and 18min - Average sunshine in October:
6h and 6min - Average sunshine in November:
5h and 30min - Average sunshine in December:
4h and 48min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days
Glenarm, IL
- Average sunshine days in January:
22.2 days - Average sunshine days in February:
18.7 days - Average sunshine days in March:
18.6 days - Average sunshine days in April:
16.2 days - Average sunshine days in May:
14.8 days - Average sunshine days in June:
14 days
- Average sunshine days in July:
16 days - Average sunshine days in August:
16.2 days - Average sunshine days in September:
18.5 days - Average sunshine days in October:
21.8 days - Average sunshine days in November:
21.8 days - Average sunshine days in December:
22.6 days
The month with the most sunshine days is December (22.6 days).
The month with the least sunshine days is June (14 days).
Average UV index
Glenarm, IL
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Glenarm, IL
The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are June and September (Cloud cover 29).
Average visibility
Glenarm, IL
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
